18856022388 has 48 divisors (see below), whose sum is σ = 50341455360. Its totient is φ = 5381142624.

The previous prime is 18856022387. The next prime is 18856022417. The reversal of 18856022388 is 88322065881.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18856022388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18856022387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58506 + ... + 202817.

It is an arithmetic number, because the mean of its divisors is an integer number (1048780320).

Almost surely, 2^18856022388 is an apocalyptic number.

It is an amenable number.

18856022388 is an abundant number, since it is smaller than the sum of its proper divisors (31485432972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18856022388 is a wasteful number, since it uses less digits than its factorization.

18856022388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262196 (or 262194 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 18856022388 in words is "eighteen billion, eight hundred fifty-six million, twenty-two thousand, three hundred eighty-eight".